 | | Journal (article/letter/editorial) | | Au-Ag,HgandPb,andelectrum (Earlset al., raghinalt quartz-sulfide-gold veindeposit in NorthernIreland tellurides...thatisthesubject of thepresent contribution. TheCurraghinalt quartz-gold veindeposit in NorthernIreQuartz Vein Fabrics...andcrosscuts andcements clasts of to brecciated (Q3-type)quartz,producing oscillatory zoning the early,barrenQ1...Widthofimage = 440/•m.B.SEM-CL image illustrating quartz types Q1toQ4.NoteQ3euhedra growing intoopen porespace...SEMimageshowing quartz(qz)overgrowing pyrite(py).Fracture crosscutting pyrite contains quartz andsecondary |  | | Report (chapter) | | identified: (1) early hematitic calcite-quartz + pyrite; (2) quartz-calcite + sphalerite, galena, chalcopyrite... pyrite, barite; (3) ankerite-ferroan dolomite-quartz + sphalerite, pyrite. Vein types 2 and 3 are associated...data. In addition, primary inclusions hosted by quartz and sphalerite commonly contain CO2 as indicated...CO2 on cooling. Bulk fluid inclusion analyses on quartz vein samples show that the fluid composition is...non-ferroan dolomite, calcite, barite, hematite and quartz (Hitzman 1995b; Eyre et al. 1996; Braithwaite & |  | | Journal (article/letter/editorial) | | Three–dimensional observation of the boundary region between massive feldspar and graphic granite by...interface between massive potassium (K)–feldspar and quartz–feldspar intergrowth (graphic granite) of two samples...very flat spatial distribution of the tips of the quartz crystals. The sharp interface between the graphic...coexisting aqueous fluid, such as the connectivity of the quartz crystals, are also discussed, for example, the...of the supercritical state on the nucleation of quartz crystals. Keywords: Graphic granite, Pegmatite |  | | Journal (article/letter/editorial) | | Bevan et al. 1998. Meteorite flux in the Nullarbor region, Australia. In Meteorites: Flux with time and impact...interesting effect [3]. Ice in the Allan Hills region has an 18O value of ~40‰ [4], which compares to...then spread to nearby countries such as Morocco, Mauritania, Mali, and Niger. The most remarkable samples...stones collected by nomads in the whole Saharan region are currently marketed in Morocco, and eventually...of fine-grained quartz grains. Quartz Grains in Fractures: The morphology of quartz grains up to 1 mm |  | Kriulina, G. Yu., Iskrina, A. V., Zedgenizov, D. A., Bobrov, A. V., Garanin, V. K. (2019) The Compositional Peculiarities of Microinclusions in Diamonds from the Lomonosov Deposit (Arkhangelsk Province) Geochemistry International, 57 (9) 973-980 doi:10.1134/s0016702919090052 | Journal (article/letter/editorial) | | Own diamond absorption Water Water Carbonate Quartz Carbonate Absorption A207 1550 C–H 2550 Wavenumber...of microinclusions in samples 1785-3, 1787-313, A210, and A213. The concentration of SiO2 + Al2O3 in...related to the presence of the free SiO2 phase (quartz), e.g., sample 1787–311. The molar proportion of |  | | Report (chapter) | | Fluid inclusions from dolomite and authigenic quartz indicate relatively high temperatures (>105 ~ of...exploited as a conduit. (e) PPL view of euhedral quartz crystals within micrite of the Waulsortian Limestone...is contemporaneous with the precipitation of the quartz. Note the selective dolomitization of the micritic...silica. (e) PPL view of the relict pre-dolomite quartz crystals (arrows) at Subulter. (f) The same view...under CL. All scale bars are 500 IJm. shows that quartz precipitation p r e d a t e d or was c o n t e |  | | Report (issue) | | shared his knowledge of Cenozoic stratigraphy of the region with us in the field. Shell Denison, of El Oro...andesites and sandstone are intruded by a stock of quartz monzonite of Late Cretaceous age (73.4+2.5 m.y...) apparently centered near Copper Flat, and by quartz latite dikes radial to the stock. A low-grade...to the Copper Flat stock (Kuellmer, 1955), the quartz latite dikes are mineralized, and veins radial...Some gold came from disseminated sulfides in the quartz monzonite, but inasmuch as the stock is barely |  | | Journal (article/letter/editorial) | | The samples are single crystals of synthesized quartz, natural quartzite, high-purity amorphous silica...8 1440 quartz|| rod 4 3.209 0.2553 0.0025 3.663 2.648 0.8763 0.0697 010213c-1§ 25 8 720 quartz|| rod 4...8 360 quartz|| rod 4 3.207 0.3599 0.0051 3.663 2.648 0.8757 0.0983 010213c-3§ 25 8 180 quartz|| rod 4...720 quartz|| piece ~3×2×1 3.051 0.3020 0.0040 3.663 2.648 0.8331 0.0825 010214c 25 7 720 quartz|| piece**...for Al, V and Ti; Olhoeft and Johnson (1989) for quartz, Fe and Ni. ‡ CT value/LAC (fp/μ). § CT images |  | | Journal (article/letter/editorial) | | these deposits and ongoing exploration in this region, there is still significant debate about the genesis... Cl Quartz Quartz Quartz Quartz Quartz Quartz Quartz Calcite Sphalerite Calcite Quartz Quartz Quartz...Synsedimentary-syndiagenetic ore G-3 Quartz G-3 Calcite G-4a Quartz G-4b Quartz G-15b Quartz Sphalerite G-23 2 19 19...contamination from mineral inclusions within the quartz that were too small to have been 0361-0128/98/000/000-00...Society of America Abstracts with Programs, v. 28, p. A210–211. Fallick, A.E., Ashton, J.H., Boyce, A.J., Ellam |  | | Journal (article/letter/editorial) | | 2008.02.001 nH2O), chalcedony (cryptocrystalline quartz), and Fe–Mn oxides. Sedimentary carbonates, such...deposition of vapor-phase tridymite, cristobalite, quartz, feldspar, hematite, zeolites, and clays along...minerals, early stage calcite, fluorite, and chalcedony–quartz, and then intermediate- and late-stage calcite...coatings so that small amounts of cryptocrystalline quartz were observed only in subsamples with 207Pb/235U...(Neymark et al., 2003). The crystallinity of the quartz in the silica subsamples increased with age and |  | Hyde, Brendt C., Tait, Kimberly T., Moser, Desmond E., Rumble, Douglas, Thompson, Michelle S. (2020) Accretionary mixing of a eucrite impactor and the regolith of the L chondrite parent body. Meteoritics & Planetary Science, 55 (1) 20-35 doi:10.1111/maps.13416 | Journal (article/letter/editorial) | | b) A higher magnification image of the sheared region. information). The pyroxene grains always contain...remnant coarser grained intergrowth texture. This region includes pigeonite and anorthite areas as large...coarser grained region. EBSD measurements indicate that some of the silica is quartz (Fig. 4b), whereas...The rim is generally 1–3 mm in width, but in one region is nonexistent (Figs. 1 and 2 top). It exhibits...and quartz in the relict coarse texture region of the xenolithic clast. a) A BSE image of a region predominantly |  | | Journal (article/letter/editorial) | | Shock-induced structural disorder in plagioclase and quartz. In Shock Metamorphism ofNatural Materials (eds...core 64002. Proc. Lunar Planet. Sci. Con! 13th, A210-A220. JAMES O. B. (1981) Petrologic and age relations |  | | Journal (article/letter/editorial) | | coastal sands are composed of medium to coarse quartz sands derived from the Usubetsu River. 3. The 1993...is distributed between B210 and B250 and between A210 and A320 (Fig. 8). It overlies Unit 1 or Unit 2...calcite is 2.71, or only slightly higher than that of quartz (2.65), we considered that the foraminiferal tests...Geological observations of the Sanriku coastal region damaged by the tsunami due to the Chile earthquake |  | | Journal (article/letter/editorial) | | amounts of pyrite, pyrrhotite, chlorites, micas, quartz and lesser amounts of Cu and Zn sulfides. All three...acetate) were detected by monitoring the absorbance (A210 nm) of the column effluent and comparing these absorbance... pyrite, pyrrhotite, chlorite minerals, micas, quartz, Fe-oxides, jarosite, etc.). Particulate material...ferrihydrite maghemite ¢ristobalite SiO 2 (am) chalcedony quartz 1.05 - 1.10 0.84 - 3,29 1,43 1,08 2,52 2.17 1...silicates (cristobalite, amorphous silica, chalcedony, quartz and magadiite; Table 5). TEM observations showed |  | | Journal (article/letter/editorial) | | Kamiskotia area (Abitibi greenstone belt, Timmins region) hosts a series of past-producing copper-zinc volcanic-associated...area of the Abitibi greenstone belt in the Timmins region (Fig. 1, Table 1). The study involved regional...0459 0.0446 0.00153 0.00158 0.00162 03BHA-0382 Quartz-phyric rhyolite, Robb Twp. (NAD83, Zone 17, UTM...A110 MAH4098 0.0002 82 0.59 9.0 0.5 1018 0.52258 A210 MAH4099 0.0001 81 0.55 4.9 0.6 488 0.52458 B111...0.0641 0.0367 0.0392 Analysis no. 04BHA-0297 Quartz-feldspar-phyric rhyolite, central Loveland Twp |  | Parnell, J., Earls, G., Wilkinson, J. J., Hutton, D. H. W., Boyce, A. J., Fallick, A. E., Ellam, R. M., Gleeson, S. A., Moles, N. R., Carey, P. F., Legg, I., Carey, P. F. (2000) Regional Fluid Flow and Gold Mineralization in the Dalradianof the Sperrin Mountains, Northern Ireland. Economic Geology, 95 (7) 1389-1416 doi:10.2113/gsecongeo.95.7.1389 | Journal (article/letter/editorial) | | Cathodoluminescence microscopy distinguishes four phases of vein quartz in the Curraghinalt gold prospect. Fluid inclusion...fluids responsible for the precipitation of each quartz phase and associated sulfide and precious metal...(Q2) forms an extensive cement to brecciated early quartz and is believed to have involved a fluid (~15 wt...subsequently reactivated with the precipitation of later quartz (Q3-Q4) from a formation water believed to be resident...gold and probably had a separate source. In the region of Cononish, the parent fluid for base metal sulfides |  | Zeigler, Ryan A., Korotev, Randy L., Haskin, Larry A., Jollif, Bradley L., Gillis, Jeffrey J. (2006) Petrography and geochemistry of five new Apollo 16 mare basalts and evidence for post-basin deposition of basaltic material at the site. Meteoritics & Planetary Science, 41 (2) 263-284 doi:10.1111/j.1945-5100.2006.tb00209.x | Journal (article/letter/editorial) | | source region for pyroclastic material (although no source craters are apparent in the region). INTRODUCTION...glass veins found in the plagioclase (P vein) and quartz (Q vein) of sample 60053,2-9 have different compositions...(Hd) and the composition of the bulk symplectite region (symp). Cations per 4 oxygen atoms Si 1.969 Al...Average (5) 60053,2-9 Near veins (1) 60053,2-9 Quartz (1) Oxide concentrations SiO2 TiO2 Al2O3 FeO MgO...composition of the crystalline silica phase (likely quartz) in 60053,2-9 is also listed here. Tetra = tetrahedral |  | Zeigler, Ryan A., Korotev, Randy L., Jolliff, Bradley L., Haskin, Larry A., Floss, Christine (2006) The geochemistry and provenance of Apollo 16 mafic glasses. Geochimica et Cosmochimica Acta, 70 (24) 6050-6067 doi:10.1016/j.gca.2006.08.040 | Journal (article/letter/editorial) | | hints at the presence of a KREEP-bearing source region beneath Mare Nectaris. The basaltic andesite glasses...impact, Imbrium, struck that geochemically anomalous region, depositing ITE-rich material at the Apollo 16...Modified CIPW normative composition (no Fe3+ allowed) Quartz 0.0 1.0 K-feldspar 0.0 0.8 Albite 1.5 2.4 Anorthite...Jolliff (1998) and the references therein. QMG, quartz monzogabbro. 6060 R.A. Zeigler et al. 70 (2006)...Nectaris (220 km east) is the most likely source region only for low-Ti and VLT basaltic material at the |  | | Journal (article/letter/editorial) | | variable barite, dolomite and calcite, and minor quartz. Additional sulphides, such as chalcopyrite, tennantite...temperature fluids trapped in Lower Palaeozoic hosted quartz-carbonate veins (Everett 1999; Everett et al. 1999a;...filamentous hollow tubes of hematite cemented by quartz interpreted to be fossil iron-oxidising bacteria...(e.g. calcite) and more resistant minerals (e.g. quartz). Wilkinson and Earls (2000) discussed this issue...Rathdowney Trend, Ireland. Geol Soc Am Abstr Progr 28:A210– A211 Frank JR, Carpenter AB, Oglesby TW (1982) |  | Frost, C. D., von Blanckenburg, F., Schoenberg, R., Frost, B. R., Swapp, S. M. (2007) Preservation of Fe isotope heterogeneities during diagenesis and metamorphism of banded iron formation. Contributions to Mineralogy and Petrology, 153 (2) 211-235 doi:10.1007/s00410-006-0141-0 | Journal (article/letter/editorial) | | Biwabik Formation are composed of fine-grained quartz, magnetite, siderite, greenalite, and locally,...crystals of hedenbergite growing over a matrix of quartz, magnetite, and minor actinolite (analysis 4, Table...preserved by magnetite that outlines the granules and quartz that fills them (Fig. 2c). There is no measurable...(marked ‘‘cpx’’) overgrow a matrix dominated by quartz and magnetite with minor calcite and actinolite...Fayalite-bearing iron formation composed of olivine (~40%), quartz (~45%) and magnetite (~15%) with minor grunerite |  | Rossetti, Federico, Asti, Riccardo, Faccenna, Claudio, Gerdes, Axel, Lucci, Federico, Theye, Thomas (2017) Magmatism and crustal extension: Constraining activation of the ductile shearing along the Gediz detachment, Menderes Massif (western Turkey) Lithos, 282. 145-162 doi:10.1016/j.lithos.2017.03.003 | Journal (article/letter/editorial) | | that activity of the GDF was pulsed and hence the region experienced episodes TE of pulsed extension (Bozkurt...secondary, sub-horizontal foliation outlined by quartz-biotite folia with variable proportions of feldspar...°C; e.g., Passchier and Trouw, 2005) (Fig. 4d). Quartz shows dynamic recrystallization, dominantly assisted...Passchier and Trouw, 2005; Stipp et al., 2002). Quartz grains also exhibit undolose extinction 9 ACCEPTED...with the Aegean region and a model for the development of the GDF In the Aegean region, the Neogene post-orogenic |  | | Journal (article/letter/editorial) | | 1991; Sen Gupta, 1993.. The resin was housed in quartz columns Ž23 cm long, 0.5 cm ID with a 22 ml reservoir...Society of America Abstracts with Progs. 29 Ž6., A210. Ely, J.C., Neal, C.R., 1997b. Analytical technique |  | HANSON, R. B., SORENSEN, S. S., BARTON, M. D., FISKE, R. S. (1993) Long-Term Evolution of Fluid-Rock Interactions in Magmatic Arcs: Evidence from the Ritter Range Pendant, Sierra Nevada, California, and Numerical Modeling. Journal of Petrology, 34 (1) 23-62 doi:10.1093/petrology/34.1.23 | Journal (article/letter/editorial) | | 5l 8 O values ( + 11 to + 16%<>; whole rock and quartz phenocrysts); however, lower-section rocks within...the last and most important thermal event in the region; the oldest phase of the Tuolomne intrusive series...strongly foliated rocks are composed predominantly of quartz+plagioclase+hornblende + biotite + K-feldspar ±...isograd Minerals Felsic Mafc Carb Felsic Mafic Carb Quartz K Feldspar Plagioclase Muscovite - B — R Biotite...3-30 2-40 1-70 210 1-70 section, Nydicer Lakes region 2O0 3-40 055 4-50 052 005 016 5O0 3O0 098 4-40 |  | Bazhenov, Mikhail L., Levashova, Natalia M., Degtyarev, Kirill E., Van der Voo, Rob, Abrajevitch, Alexandra V., McCausland, Phil J.A. (2012) Unraveling the early–middle Paleozoic paleogeography of Kazakhstan on the basis of Ordovician and Devonian paleomagnetic results. Gondwana Research, 22 (3) 974-991 doi:10.1016/j.gr.2012.02.023 | Journal (article/letter/editorial) | | Recently published paleomagnetic data from this region demonstrate that the ~ 2000 km long horseshoe-shaped...in faint gray pattern. Some authors regard this region as a tectonic mosaic and explain its evolution...place in the southern and western parts of the region by the Ordovician–Silurian boundary: 1) volcanic...greenish in color, with chlorite in vesicles and quartz-epidote thin veins, while lava clasts in the conglomerate...D = 234°, I = −49°. As main deformation in this region predates the Permian (Zaytsev, 1984), the remagnetization |  | | Journal (article/letter/editorial) | | distinct Mississippi Valley-type (MVT) systems in the region (e.g.,, Kinnitty, Harberton Bridge) that formed...the nature of the fluid regimes operating in the region prior to, during, and subsequent to the main stages...calcite and dolomite, plus variable barite and minor quartz (Fig. 2). Mineralization in the ore deposits principally...is apparent for any mineral host. Sphalerite and quartz are the strongest host minerals and therefore might...C3 di s s em i nated py ri te sparry calcite quartz/chalcedony magnetite-hematite barite shal l o |
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